HYDROALCOHOLIC SKIN CARE
EMULSIONS
Ethanol can provide
several benefits to products like these,
including solvent and application properties, a
cooling effect on the skin, and enhancement of
perfume quality. However, formulators avoid
ethanol as it is difficult to prepare stable
emulsions in its presence; in fact, ethanol is
often used in the laboratory to break emulsions.
The performance of BRIJ(r) 721 Steareth-21 in
preparing stable emulsions is testimony to its
versatility and effective performance.
| Formula
SK-12 |
| |
|
NON-GREASY
EMOLLIENT CREAM This cream
utilizes isopropyl myristate for
emollience with a
low degree of oiliness. The ethanol
provides cool
application and there is no whitening.
|
|
%,
Weight |
| A |
|
Isopropyl
myristate |
|
10.0 |
| |
|
Stearyl alcohol |
|
4.00 |
| |
|
BRIJ 721
Steareth-21 |
|
5.11 |
| |
|
BRIJ 72
Steaeth-2 |
|
1.89 |
| B |
|
Water,
deionized |
|
58.10 |
| |
|
Carbomer 934 |
|
0.40 |
| C |
|
Sodium
hydroxide solution, 10% aqueous |
|
0.40 |
| D |
|
Preservative |
|
q.s. |
| E |
|
Perfume |
|
0.10 |
| F |
|
Ethanol, SDA-40
(190 proof) |
|
20.00 |
| |
|
|
|
100.00 |
Preparation:
Heat (A) to
70°C. Add (B) to (A) slowly with moderate
agitation. Add (C), Add (D) below 50°C. Add (E)
and (F) at 35°C. Replace water lost by
evaporation and package.
| Formula
SK-13 |
| |
|
MINERAL
OIL EMULSION CONTAINING
ETHANOL
Formula SK-13 is
a mineral oil cream with a luxurious
afterfeel. The
alcohol provides a cooling effect as the
cream spreads
smoothly with good "rub-in"
characteristics
resulting in a
non-greasy feel.
|
|
%,
Weight |
| A |
|
Light mineral
oil |
|
8.00
|
| |
|
Stearyl alcohol |
|
1.00 |
| |
|
BRIJ 721
Steareth-21 |
|
2.28 |
| |
|
BRIJ 72
Steaeth-2 |
|
1.72 |
| B |
|
Water,
deionized |
|
66.00 |
| |
|
Carbomer 934 |
|
0.40 |
| C |
|
Sodium
hydroxide solution, 10% aqueous |
|
0.40 |
| D |
|
Preservative |
|
q.s. |
| E |
|
Perfume |
|
0.20 |
| F |
|
Ethanol, SDA-40
(190 proof) |
|
20.00 |
| |
|
|
|
100.00 |
Preparation:
Heat (A) to
70°C and (B) to 72°C. Add (B) to (A) slowly
with moderate agitation. Add (C), Add (D) below
50°C. Add (E) and (F) at 35°C. Replace water
lost by evaporation and package.
|
